如何使用Java开发物联网硬件的心率监测功能

import javax.bluetooth.*;
import java.io.IOException;

public class HeartRateMonitor {
    private static final String DEVICE_NAME = "Heart Rate Sensor";
    
    public static void main(String[] args) {
        DiscoveryAgent discoveryAgent;
        RemoteDevice remoteDevice;
        
        try {
            LocalDevice localDevice = LocalDevice.getLocalDevice();
            discoveryAgent = localDevice.getDiscoveryAgent();
            
            DiscoveryListener listener = new DiscoveryListener() {
                @Override
                public void deviceDiscovered(RemoteDevice remoteDevice, DeviceClass deviceClass) {
                    try {
                        String deviceName = remoteDevice.getFriendlyName(false);
                        if (DEVICE_NAME.equals(deviceName)) {
                            // 连接到心率传感器
                            HeartRateMonitor.connect(remoteDevice);
                        }
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }

                // 省略其他回调方法的实现
            };
            
            discoveryAgent.startInquiry(DiscoveryAgent.GIAC, listener);
        } catch (BluetoothStateException e) {
            e.printStackTrace();
        }
    }
    
    private static void connect(RemoteDevice remoteDevice) throws IOException {
        // 连接到设备的逻辑代码
        // ...
    }
}

import java.io.IOException;
import java.io.InputStream;

public class HeartRateMonitor {
    // ...

    private static void connect(RemoteDevice remoteDevice) throws IOException {
        // 建立连接的逻辑代码
        // ...

        // 读取心率数据的逻辑代码
        InputStream inputStream = // 获取输入流
        while (true) {
            byte[] buffer = new byte[1024];
            int bytesRead = inputStream.read(buffer);
            if (bytesRead > 0) {
                // 处理读取到的心率数据
                HeartRateMonitor.processData(buffer, bytesRead);
            }
        }
    }

    private static void processData(byte[] buffer, int bytesRead) {
        // 处理心率数据的逻辑代码
        // ...
    }
}

import java.net.HttpURLConnection;
import java.net.URL;

public class HeartRateMonitor {
    // ...
    
    private static void processData(byte[] buffer, int bytesRead) {
        // 处理心率数据的逻辑代码
        // ...

        // 将数据发送到服务器的逻辑代码
        try {
            URL url = new URL("http://example.com/api/data"); // 服务器接口的URL
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("POST");
            connection.setDoOutput(true);
            connection.getOutputStream().write(buffer, 0, bytesRead);
            connection.getOutputStream().flush();
            connection.getOutputStream().close();

            int responseCode = connection.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK) {
                // 发送数据成功
                // ...
            } else {
                // 发送数据失败
                // ...
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}